JPH0666315U - Buckle device for vehicle seat belt device - Google Patents

Abstract

(57) [Summary] [Purpose] To release the lock by an occupant's operation with a moderate amount of force, securely prevent the lock from being released by inertial force. [Structure] The lock pin 60 holds the engagement of the lock plate 38 with the tongue plate 24 in the first position. When the occupant operates the release button 78 to move the lock pin 60 from the first position to the second position, at the second position,
The lock plate 38 can be released from the tongue plate 24, and the lock can be released. When an inertial force (an inertial force acting in the direction of arrow A) that moves the lock pin 60 from the first position to the second position acts due to sudden vehicle deceleration or the like, the weight plate 100 causes the lock pin holder to move. 64, moving ahead of the lock pin 60. As a result, the resin spring 106 is pressed and deformed by the weight plate 100, and the claw 108 projects from the recess 94 of the lock pin holder 64. The protruding claw portion 108 is the engaging recess 1
10 is engaged, and after the engagement, the lock pin 60 is prevented from moving.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a buckle device for a vehicle seatbelt device for locking and unlocking a tongue plate.

[0002]

[Prior art]

 A buckle device of a vehicle seat belt device is provided with a lock plate, and the lock plate engages and disengages with the tongue plate to lock and unlock the tongue plate. In addition, the buckle device is provided with a lock pin, which holds the engagement of the lock plate with the tongue plate at the first position, and the occupant presses the release button to operate the first position. To the second position. At the second position, the tongue plate can be released from the lock plate and the tongue plate can be unlocked.

[0003]

[Problems to be solved by the device]

 By the way, due to sudden deceleration of the vehicle, inertial force acts on each part of the buckle device. When an inertial force acts to move the lock pin from the first position to the second position, the lock pin moves to the second position and the tongue plate moves even if the release button is not operated. May be unlocked.

In order to prevent this, it is necessary to increase the spring biasing force that biases the lock pin to the first position to counteract the inertial force.

However, if the spring biasing force is increased, an excessive force is required for the lock release operation by the occupant.

In view of the above facts, the present invention has an object to provide a buckle device for a vehicle seat belt device in which the lock release by an operation of an occupant is sufficient with a moderate force, and the lock release by inertial force is surely prevented. Is.

[0007]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention provides a base body into which a tongue plate is inserted and removed, a lock member provided on the base body to lock and unlock the tongue plate by engaging and disengaging the tongue plate, and the base body. Holding means that is provided at the first position and can move between the first position and the second position, and that holds the engagement of the lock member with the tongue plate at the first position and allows the lock member to be disengaged from the tongue plate at the second position. And a release member operated by an occupant to unlock the lock and moving the holding means from the first position to the second position, and an inertial force acting to move the holding means from the first position to the second position. In this case, the inertial force causes the inertial body to move ahead of the holding means in the moving direction of the holding means, and the inertial body provided on the holding means moves ahead of the holding means to the inertial body. Deformation means for pressing and deforming to project the claw portion from the holding means; and a blocking portion provided on the base body for blocking the movement of the holding means to the second position by engaging with the claw portion. The present invention proposes a buckle device for a vehicle seat belt device, which is characterized by:

[0008]

[Action]

 According to the buckle device for a vehicle seat belt device of the present invention, the tongue plate is inserted into the base body, the locking member engages with the tongue plate to lock the tongue plate, and the locking member separates from the tongue plate. Then, the tongue plate is unlocked.

The retaining means retains the engagement of the locking member with the tongue plate in the first position. When the occupant operates the release member to move the holding means from the first position to the second position, at the second position, the lock member is allowed to disengage from the tongue plate, and the lock can be released. .

When an inertial force that moves the holding means from the first position toward the second position acts due to sudden vehicle deceleration or the like, the inertial body moves before the holding means due to the inertial force. As a result, the deforming means is pressed by the inertial body and deforms, and the claw portion projects from the holding means. The protruding claw portion engages with the blocking portion, and after the engagement, the movement of the holding means is blocked.

By this, the engagement of the locking member with the tongue plate is still maintained and is not unlocked by the action of inertial force.

Therefore, even if the biasing force that biases the holding member to the first position is not excessive, when an inertial force that moves the holding member from the first position to the second position acts, Inertial force can be countered, and the lock release by the occupant's operation can be done with moderate force, and the lock release by inertia force can be reliably prevented.

[0013]

【Example】

 A buckle device for a vehicle seat belt device according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4.

As shown in FIG. 1, a frame 16 is disposed between a lid cover 12 and a base cover 14, and the lid cover 12, the base cover 14 and the frame 16 constitute a base body.

The frame 16 is bent and formed in a U shape except for both ends in the longitudinal direction, and is composed of a frame bottom plate 18 and a pair of opposing frame leg plates 20. At one end of the frame 16 in the longitudinal direction, an insertion / removal opening 22 is formed between the lid cover 12 and the base cover 14, and a tongue plate 24 having an intermediate portion of a webbing (not shown) is inserted into the frame. It is inserted into the frame 16 through the insertion / removal opening 22 along the longitudinal direction of 16 and is also ejected out of the frame 16. In each figure, the tongue plate insertion direction is indicated by arrow A, and the tongue plate escape direction is indicated by arrow B. At the other end of the frame 16 in the longitudinal direction, a mounting hole 26 is formed in the frame bottom plate 18 and is used for mounting the buckle device to the vehicle.

An ejector guide hole 28 is formed in the frame bottom plate 18, and an ejector 30 is fitted into the ejector guide hole 28 so as to be slidable in the tumbling plate inserting / removing direction. An ejector coil spring 32 is interposed between the locking projection 34 of the ejector 30 and the locking projection 36 of the edge of the ejector guide hole 28 in the tongue plate insertion direction. 30 is urged in the direction of escaping the tongue plate. When the tongue plate 24 is inserted into the frame 16 and the ejector 30 is pressed by the tip of the tongue plate 24, the ejector 30 slides in the tongue plate insertion direction against the coil spring 32.

Inside the frame 16, a plate-shaped lock plate 38 that extends in the tongue plate insertion / removal direction and constitutes a lock member is arranged. A supporting piece 40 is bent and formed toward the lid cover 12 at an end of the lock plate 38 in the tongue plate inserting direction. The supporting piece 40 is wider than other portions and is stretched between the frame leg plates 20 to support it. Both ends of the holding piece 40 in the bridging direction are fitted into the notches 42 formed in the frame leg plate 20. The notch 42 has a wedge shape, and the lock plate 38 is rotatable within a range in which the support piece 40 can move within the notch 42 with the bottom of the notch 42 as a rotation center.

A U-shaped portion 44 that opens toward the frame bottom plate 18 is bent and formed at an end of the lock plate 38 in the tongue plate escape direction, and a tip end portion that extends toward the bottom plate 18 has an engaging piece 48. It is said that The engagement piece 48 engages with the engagement hole 46 of the tongue plate 24 by the rotation of the lock plate 38 in one direction, and disengages from the engagement hole 46 of the tongue plate 24 by the rotation of the lock plate 38 in the opposite direction. The engaging / disengaging direction of the engaging piece 48 is orthogonal to the inserting / removing direction of the tongue plate 38. By engaging the lock plate 38 with the tongue plate 24, the tongue plate 24 is locked and the tongue plate 24 is prevented from coming out. When the lock plate 38 is separated from the tongue plate 24, the tongue plate 24 is unlocked. Then, the tongue plate 24 is allowed to escape. In each drawing, the engagement direction of the lock plate 38 is indicated by an arrow C, and the disengagement direction is indicated by an arrow D.

A pair of actuating pieces 50 extends toward the frame bottom plate 18 on both sides of the supporting piece 40 of the lock plate 38 in the bridging direction. The ejector 30 is pressed by the tongue plate 46 and slides in the tongue plate insertion direction, and the protrusion 52 of the ejector 30 corresponding to the operating piece 50 abuts the operating piece 50 and presses the operating piece 50. The lock plate 38 rotates so that the lock plate 38 engages with the tongue plate 24.

A spring holder 54 is attached to the support piece 40 of the lock plate 38. For this attachment, the spring holder 54 is formed with a locking projection 56, and the support piece 40 is formed with a locking recess 58 corresponding to the locking projection 56.

A lock pin 60, which constitutes a holding means together with a lock pin holder 64 described later, is stretched between the frame leg plates 20. A long pin guide hole 62 is formed in each leg plate 20 in the tongue plate insertion / removal direction, and both ends of the lock pin 60 are passed through the pin guide hole 62. The lock pin 60 is guided by the pin guide hole 62 and is movable in the tongue plate insertion / removal direction between the first position (position in FIG. 2) and the second position (position in FIG. 3). In the first position, the lock pin 60 comes into contact with the surface of the bottom of the U-shaped portion 44 of the lock plate 38 on the side of the lid cover 12 to prevent the lock plate 38 from being separated from the tongue plate 24, and thus the lock plate 38. The engagement with the tongue plate 24 of the lock plate 38 is maintained, and in the second position, the lock pin 60 is disengaged from the U-shaped portion 44 of the lock plate 38 in the tongue plate insertion direction side, and the lock pin 60 is engaged with the tongue plate 24 of the lock plate 38. Withdrawal is allowed. The bottom of the U-shaped portion 44 has a wide width and secures a wide contact surface with the lock pin 60.

The lock pin 60 is supported by a lock pin holder 64. The lock pin holder 64 is formed in a U-shape by a bridging portion 66 that is hung between the frame leg plates 20, and leg portions 68 that enter between the side wall of the lid cover 12 and the frame leg plate 20 at both ends in the bridging direction. The leg portion 68 has a fitting hole 70 into which the end of the lock pin 60 inserted through the pin guide hole 62 fits. As a result, the lock pin holder 64 moves in the tongue plate insertion / removal direction together with the lock pin 60. A lock pin coil spring 72 is interposed between a locking projection 74 on the bridging portion 66 of the lock pin holder 64 and a locking projection 76 of the spring holder 54. According to the lock pin coil spring 72, the lock pin holder 64 is urged in the tongue plate escape direction, and thus the lock pin 60 is urged toward the first position, and at the same time, the lock plate 38 and the tongue plate 24 are moved. It is urged in the releasing direction.

A release button 78, which constitutes a release member, is provided on the lid cover 12 side of the insertion / removal opening 22. The release button 78 is formed in a U-shape, and the end portion in the tongue plate insertion direction straddles both frame leg plates 20 and can come into contact with the hanging portion 66 and the leg portion 68 of the lock pin holder 64. The end portion of the tongue plate in the escape direction is closed by the operation portion 82 with which the occupant abuts. Between the contact portion 80 and the operation portion 82, the side wall 84 of the release button 78 is formed by being recessed inside the release button 78 and enters the inside of the frame 16. An inner groove 86 is formed in the side wall 84, and a protrusion 87 formed at the end of the side plate 20 of the frame 16 on the tang plate escape direction side can engage and move in the guide groove 86. The release button 78 can move in the tongue plate insertion / removal direction within a range in which the protrusion 86 can move in the guide hole 86.

A release button coil spring 88 is interposed between the locking projection 90 on the contact portion 80 of the release button 78 and the locking projection 92 of the spring holder 54, and the hooking portion 66 of the lock pin holder 64 is provided. At the central portion of the bridging direction, the engaging projection 90 is inserted, and a concave portion 94 into which the coil spring 88 is inserted is formed. According to the release button coil spring 88, the release button 78 is biased in the tongue plate escape direction, and at the same time, the tongue plate 38 is biased in the detachment direction from the tongue plate.

When the occupant presses the release button 78 in the direction of inserting the tongue plate in the locked state of the tongue plate shown in FIG. 2, the contact portion 80 of the release button 78 resists the release button coil spring 88 and the lock pin coil spring 72. Then, the lock pin holder 72 is moved in the tongue plate insertion direction. As a result, as shown in FIG. 3, the lock pin 60 moves from the first position to the second position, and at the second position, the lock plate 38 is disengaged from the tongue plate 24. As a result, the lock plate 38 is separated from the tongue plate 24 by the release button coil spring 88 and the lock pin coil spring 72, and then the tongue plate 24 is released by the ejector coil spring 32. When the occupant releases the release button 78, the lock pin 60 remains in the second position, and only the release button 78 returns to the original position by the coil spring 88.

The locking portion 66 of the lock pin holder 64 is formed with rectangular holes 67 at both ends in the locking direction, and the contact portion 80 of the release button 78 penetrates the rectangular hole 67. A guide projection 81 that can be formed is formed, which enables smooth movement of the lock pin holder 64 and relative movement with the lock pin holder 64.

On the other hand, inside the release button 78, a rectangular plate-shaped weight plate 100 that constitutes an inertial body is provided. The weight plate 100 is fitted in the guide groove 102 formed on the inner surface of the side wall 84 of the release button 78, and is movable in the tongue plate insertion / removal direction with respect to the release button 78. The guide groove 102 allows the weight plate 100 to move in the tongue plate escape direction with respect to the release button 78 at the position where the tongue plate insertion direction end of the weight plate 100 is retracted into the release button 78. Be blocked.

A weight plate coil spring 104 is also provided inside the release button 78, and one end of the weight plate coil spring 104 is locked by a locking projection 106 on the inner surface of the operation portion 82, so that the weight plate coil The other end of the spring 104 is locked to the end of the weight plate 100 in the tongue plate escape direction. According to the weight plate coil spring 104, the weight plate 100 is biased to the position where the tongue plate insertion direction end of the weight plate 78 is retracted into the release button 78.

As shown in FIG. 4, when an inertial force acts to move the lock pin 60 from the first position to the second position, that is, the lock pin holder 64 is pressed and moved by the inertial movement of the release button 78. If the inertial force acts in the direction of the arrow A so that the lock pin holder 64 and the lock pin 60 inertially move by themselves, the inertial force causes the weight plate 100 to move the release button 78 and the release button 78, The lock pin holder 64 and the lock pin 60 move forward (inertial movement) in the tongue plate insertion direction against the weight plate coil spring 104, whereby the end portion of the weight plate 100 in the tongue plate insertion direction. Enters the recess 94 of the lock pin holder 64 from the position where it is pulled into the release button 78.

A pair of resin springs 106 are provided on both side surfaces of the recess 94 so as to face each other. The resin spring 106 is integrally molded with the lock pin holder 64 and has a semi-annular shape. One end of the resin spring 106 is connected to the side surface of the recess 94 and cantilevered at one end thereof, and the other end of the resin spring 106 serves as a claw 108 and faces the lid cover 12. Normally, the claw 108 is It is recessed in the recess 94. The middle portion of the resin spring 106 and the bottom of the recess 94 are separated from each other, and this gap is formed thinner than the thickness of the weight plate 100. When the end portion of the weight plate 100 in the tongue plate insertion direction is inserted, the middle portion of the resin spring is pressed and elastically deformed, and the claw portion 108 projects out of the recess 94 toward the bottom wall of the lid cover 12.

Corresponding to the claws 108, a pair of engaging recesses 110 that form a blocking portion are formed on the inner surface of the bottom wall of the lid cover 12, and the engaging recesses 110 engage the protruding claws 108. After the engagement, inertial movement of the release button 78, the lock pin holder 64, and the lock pin 60 is blocked.

Next, the operation of the above embodiment will be described. The tongue plate 24 is inserted into the frame 16, the lock plate 38 is engaged with the tongue plate 24 to lock the tongue plate 24, the lock plate 38 is disengaged from the tongue plate 24, and the tongue plate 24 is locked. It will be canceled.

The lock pin 60 holds the lock plate 38 in engagement with the tongue plate 24 in the first position.

When the occupant operates the release button 78 to move the lock pin 60 from the first position to the second position, the lock plate 38 is disengaged from the tongue plate 24 at the second position. The lock can be released.

When an inertial force (an inertial force acting in the direction of arrow A) that moves the lock pin 60 from the first position to the second position acts due to sudden vehicle deceleration or the like, the weight plate 100 Moves before the lock pin holder 64 and the lock pin 60. As a result, the resin spring 106 is pressed and deformed by the weight plate 100, and the claw 108 projects from the recess 94 of the lock pin holder 64. The protruding claw 108 engages with the engagement recess 110, and after the engagement, the movement of the lock pin 60 is blocked.

As a result, the engagement of the lock pin 60 with the tongue plate 24 is still maintained, and the lock pin 60 is not unlocked by the action of inertial force.

Therefore, even if the biasing force that biases the lock pin 60 to the first position is not excessive, an inertial force (arrow A to move the lock pin 60 from the first position to the second position). (Inertial force acting in the direction) can counteract the inertial force, and the unlocking by the operation of the occupant is sufficient with a moderate force, and the unlocking by the inertial force is surely prevented.

The lock pin 60 has a structure incapable of moving in the other directions (the directions of arrows B, C, and D). Therefore, no matter which direction the inertial force acts on, the lock pin 60 is locked. The engagement state of the tongue 38 with the tongue plate 24 is maintained.

Particularly, since the claw portion 108 of the resin spring 106 is engaged with the engaging recess 110 to directly prevent the lock pin holder 64 and the lock pin 60 from moving, the lock release by the inertial force is prevented more reliably. can get.

The present invention is not limited to the above embodiment, but various modifications can be made. For example, in the above embodiment, the weight plate 100 forming an inertial body is provided on the release button 78, but the present invention is not limited to this, and the lock pin holder 64, the lock pin 60, or the frame 16, the lid cover 12 are provided. It may be provided on the base cover 14 as long as it can be moved earlier than the lock pin holder 64 and the lock pin 60 in the moving direction of the lock pin 60.

Further, in the above embodiment, the deforming means is composed of the resin spring 108, and the resin spring 108 is formed integrally with the lock pin holder 64, but the invention is not limited to this, and The material, shape, etc. of the deforming means can be various, and the deformation may be plastic deformation instead of elastic deformation.

Further, the engagement recess 110 may be provided in the frame 16 or the base cover 14 instead of the lid cover 12.

[0043]

[Effect of device]

 According to the buckle device of the vehicle seat belt device according to the present invention, the lock release by the operation of the occupant is sufficient with a moderate force, and the lock release by the inertial force is surely prevented.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a buckle device of a vehicle seat belt device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the buckle device of the present embodiment taken along the inserting / removing direction of the tongue plate.

FIG. 3 is a view showing an unlocked state of the tongue plate, FIG.
It is a figure equivalent to.

FIG. 4 Inertia forces cause the lock pin to move from this first position to the second position.
It is a figure equivalent to FIG. 2 which shows the state at the time of acting so that it may move toward a position.

[Explanation of symbols]

 12 Lid Cover (Base) 14 Base Cover (Base) 16 Frame (Base) 24 Tongue Plate 38 Lock Plate (Lock Member) 60 Lock Pin (Holding Member) 78 Release Button (Release Member) 100 Weight Plate (Inertial Body) 106 Resin spring (deformation means) 108 Claw portion 110 Engagement concave portion (blocking portion)

Claims (1)

[Scope of utility model registration request] 1. A base body into which a tongue plate is inserted and removed, a lock member provided on the base body for engaging and disengaging the tongue plate to lock and unlock the tongue plate, and a first position provided on the base body. Holding means for moving between the second position and holding the engagement of the lock member with the tongue plate in the first position and permitting the lock member to disengage from the tongue plate in the second position; A release member operated by an occupant to move the holding means from the first position to the second position, and a holding means by the inertial force when the holding means acts to move the holding means from the first position to the second position. And an inertial body that moves ahead of the holding means in the moving direction of the holding means, and the inertial body is pressed by the inertial body due to the movement of the inertial body prior to the holding means and is deformed to move from the holding means. A vehicle seat belt device comprising: a deforming unit that projects the claw portion; and a blocking portion that is provided on the base body and that engages with the claw portion to prevent the holding unit from moving to the second position. Buckle device.